There is no truth to anything related to a movie sequel. Not a chance by a longshot.

Considering the underperformance of the movie at the box office, this doesn't come as the greatest surprise. In related news, former Wizard magazine staffer Sean T. Collins disputes the original rumor's implication that the magazine was involved in some DC Comics discussions about reviving Watchmen:

The piece didn't reflect any inside information of any kind, about the desire to introduce Watchmen's world into continuity, creating new projects involving it or anything else (like doing the same for The Dark Knight Returns, say — that's Frank Miller's dystopian Batman laying the smackdown on Rorschach, of course)... When Wizard staffers realized that readers were taking the published piece to indicate that the Watchmen-verse was one of DC's 52 universes and/or that DC would be publishing new Watchmen-based comics — for which there were no such plans, at least as far as anyone involved with the piece knew — they quickly ran a clarification on the website, which unfortunately is now lost to the the site's reboots.